From 352d4dbfb24c65f327759c00c7db7d30a9482e35 Mon Sep 17 00:00:00 2001
From: Keith Whitwell <keith@tungstengraphics.com>
Date: Mon, 10 May 2004 18:16:03 +0000
Subject: Add EXT_vertex_cull support to mesa

---
 src/mesa/main/matrix.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'src/mesa/main/matrix.c')

diff --git a/src/mesa/main/matrix.c b/src/mesa/main/matrix.c
index 19e8dc3a5a..1e6b9dd394 100644
--- a/src/mesa/main/matrix.c
+++ b/src/mesa/main/matrix.c
@@ -745,8 +745,16 @@ calculate_model_project_matrix( GLcontext *ctx )
  */
 void _mesa_update_modelview_project( GLcontext *ctx, GLuint new_state )
 {
-   if (new_state & _NEW_MODELVIEW)
+   if (new_state & _NEW_MODELVIEW) {
       _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
+    
+      /* Bring cull position uptodate.
+       */
+      TRANSFORM_POINT3( ctx->Transform.CullObjPos, 
+			ctx->ModelviewMatrixStack.Top->inv,
+			ctx->Transform.CullEyePos );
+   }
+
 
    if (new_state & _NEW_PROJECTION)
       update_projection( ctx );
@@ -898,6 +906,9 @@ void _mesa_init_transform( GLcontext *ctx )
       ASSIGN_4V( ctx->Transform.EyeUserPlane[i], 0.0, 0.0, 0.0, 0.0 );
    }
    ctx->Transform.ClipPlanesEnabled = 0;
+
+   ASSIGN_4V( ctx->Transform.CullObjPos, 0.0, 0.0, 1.0, 0.0 );
+   ASSIGN_4V( ctx->Transform.CullEyePos, 0.0, 0.0, 1.0, 0.0 );
 }
 
 
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